Name: Patent Blue V
Other names: Cl 42051, Food Blue 5, Sulphan Blue, Acid Blue 3, L-Blau 3, C-Blau 20, Patentblau, Sky Blue
Description: blue colour
Origin: Synthetic dye
- it isn’t widely used but in Europe it can be found in Scotch eggs, certain jelly sweets, blue Curaçao, certain jello varieties (though not in actual Jell-O brand products), among others
- in medicine, E131 is used in lymphangiography and sentinel node biopsy as a dye to color lymph vessels.
- it is also used in dental disclosing tablets as a stain to show dental plaque on teeth.
Daily intake: up to 15 mg/kg body weight
- rare allergic reactions have been described, due to coupling of the colour to (body) proteins
- it is a histamine liberator and may intensify symptoms of asthma
- can be consumed by all religious groups, vegans and vegetarians
- important advantage is the very deep color it produces even at low concentration, a disadvantage is that it fades fairly quickly when exposed to light
- very soluble in water